1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
/**
* @file
*
* @ingroup RTEMSBSPsSPARCLEON3
*
* @brief This source file contains a definition of
* LEON3 CPU counter support.
*/
/*
* Copyright (c) 2014, 2018 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <bsp/leon3.h>
#include <grlib/irqamp.h>
#include <rtems/counter.h>
#include <rtems/sysinit.h>
#include <rtems/score/sparcimpl.h>
static uint32_t leon3_counter_frequency = 1000000000;
uint32_t _CPU_Counter_frequency(void)
{
return leon3_counter_frequency;
}
#if defined(LEON3_HAS_ASR_22_23_UP_COUNTER) || \
defined(LEON3_PROBE_ASR_22_23_UP_COUNTER)
static void leon3_counter_use_up_counter(SPARC_Counter *counter)
{
counter->read_isr_disabled = _SPARC_Counter_read_asr23;
counter->read = _SPARC_Counter_read_asr23;
leon3_counter_frequency = leon3_up_counter_frequency();
}
#endif
#if defined(LEON3_IRQAMP_PROBE_TIMESTAMP)
static void leon3_counter_use_irqamp_timestamp(
SPARC_Counter *counter,
irqamp_timestamp *irqmp_ts
)
{
counter->read_isr_disabled = _SPARC_Counter_read_up;
counter->read = _SPARC_Counter_read_up;
counter->counter_register = &irqmp_ts->itcnt;
/* Enable interrupt timestamping for an arbitrary interrupt line */
grlib_store_32(&irqmp_ts->itstmpc, IRQAMP_ITSTMPC_TSISEL(1));
#if defined(LEON3_PLB_FREQUENCY_DEFINED_BY_GPTIMER)
leon3_counter_frequency = leon3_processor_local_bus_frequency();
#else
leon3_counter_frequency = ambapp_freq_get(ambapp_plb(), LEON3_IrqCtrl_Adev);
#endif
}
#endif
#if !defined(LEON3_HAS_ASR_22_23_UP_COUNTER)
static void leon3_counter_use_gptimer(SPARC_Counter *counter, gptimer *gpt)
{
gptimer_timer *timer;
timer = &gpt->timer[LEON3_COUNTER_GPTIMER_INDEX];
counter->read_isr_disabled = _SPARC_Counter_read_down;
counter->read = _SPARC_Counter_read_down;
counter->counter_register = &timer->tcntval;
/* Make timer free running */
grlib_store_32(&timer->trldval, 0xffffffff);
grlib_store_32(&timer->tctrl, GPTIMER_TCTRL_EN | GPTIMER_TCTRL_RS);
#if defined(LEON3_PLB_FREQUENCY_DEFINED_BY_GPTIMER)
leon3_counter_frequency = LEON3_GPTIMER_0_FREQUENCY_SET_BY_BOOT_LOADER;
#else
leon3_counter_frequency = ambapp_freq_get(ambapp_plb(), LEON3_Timer_Adev) /
(grlib_load_32(&gpt->sreload) + 1);
#endif
}
#endif
static void leon3_counter_initialize(void)
{
#if defined(LEON3_IRQAMP_PROBE_TIMESTAMP)
irqamp_timestamp *irqmp_ts;
#endif
#if !defined(LEON3_HAS_ASR_22_23_UP_COUNTER)
gptimer *gpt;
#endif
SPARC_Counter *counter;
counter = &_SPARC_Counter_mutable;
#if defined(LEON3_HAS_ASR_22_23_UP_COUNTER)
leon3_up_counter_enable();
leon3_counter_use_up_counter(counter);
#else /* LEON3_HAS_ASR_22_23_UP_COUNTER */
#if defined(LEON3_PROBE_ASR_22_23_UP_COUNTER)
leon3_up_counter_enable();
if (leon3_up_counter_is_available()) {
/* Use the LEON4 up-counter if available */
leon3_counter_use_up_counter(counter);
return;
}
#endif
#if defined(LEON3_IRQAMP_PROBE_TIMESTAMP)
irqmp_ts = irqamp_get_timestamp_registers(LEON3_IrqCtrl_Regs);
if (irqmp_ts != NULL) {
/* Use the interrupt controller timestamp counter if available */
leon3_counter_use_irqamp_timestamp(counter, irqmp_ts);
return;
}
#endif
gpt = LEON3_Timer_Regs;
#if defined(LEON3_GPTIMER_BASE)
leon3_counter_use_gptimer(counter, gpt);
#else
if (gpt != NULL) {
/* Fall back to the first GPTIMER if available */
leon3_counter_use_gptimer(counter, gpt);
}
#endif
#endif /* LEON3_HAS_ASR_22_23_UP_COUNTER */
}
RTEMS_SYSINIT_ITEM(
leon3_counter_initialize,
RTEMS_SYSINIT_CPU_COUNTER,
RTEMS_SYSINIT_ORDER_FIRST
);
SPARC_COUNTER_DEFINITION;
|
